Rival Citi Habitats claims individuals at Urban Compass’ office accessed its proprietary listing database without authorization. Urban Compass told The Real Deal that it “expressly denies” all the allegations made by Citi Habitats.

In July, Avi Dorfman sued Urban Compass, alleging that the company used his proprietary software and real estate expertise to build its service without giving him the ownership stake in Urban Compass that he was promised, The Real Deal reported.